No.1 Coal Mine of Shaanxi Shaanmei Huangling Mining Co., Ltd., Huangling, Yan’ an 727307, China

针对煤矿快速掘进下大断面巷道支护难题，以黄陵矿业一号煤矿1010回风平巷为研究对象，采用数值模拟和理论分析等研究手段，探究大断面巷道围岩变形破坏特征，给出了巷道支护方案并进行了稳定性验证。结果表明：大断面巷道未支护条件下，围岩发生大变形区域较大，肩角、底角处剪切应力集中，塑性破坏范围较大。根据极限平衡理论结合数值模拟结果，采用左旋螺纹钢锚杆＋金属网+金属梁＋锚索支护方式，支护后巷道锚杆、锚索有效防治了岩层变形破坏，控制了顶板下沉，限制了两帮变形，制止了底鼓发生，为矿井安全高效开采提供了保障。

Aiming at the difficult problem of supporting large cross-section roadway under rapid excavation in a coal mine, No.1010 return air drift of No.1 Coal Mine Huangling Mining Co., Ltd. was taken as the research object, the deformation and failure characteristics of large cross-section roadway are analyzed by method of combining numerical simulation and theoretical calculation, and the roadway support scheme was given and the stability was verified. The results showed that under the condition of unsupported large-section roadway, the area of large deformation of surrounding rock was large, the shear stress was concentrated at the shoulder and bottom corners, and the plastic failure range was large. According to the limit equilibrium theory and numerical simulation results, the support method of left-handed screw steel bolt, metal mesh, metal beam, and anchor cable was adopted. After the support, the roadway bolt and cable effectively prevented the deformation and damage of the rock stratum, controlled the roof subsidence, limited the deformation of the two sides, prevented the occurrence of floor heave, and provided a guarantee for safe and efficient mining of the mine.

石新禹. 大断面巷道变形破坏特征及支护设计应用[J]. 煤炭与化工, 2024, 47(2): 39-43.

Shi Xinyu. Deformation and failure characteristics of large cross-section roadway and application of support design. CCI, 2024, 47(2): 39-43.